SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 3)
    Identifier number
    Function if (alias offset) (children 1)
     ExpressionList (children 3)
      Function greater (children 1)
       ExpressionList (children 2)
        Identifier number
        Literal UInt64_1
      Identifier number
      Literal NULL
    Function neighbor (children 1)
     ExpressionList (children 2)
      Identifier number
      Identifier offset
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function numbers (children 1)
       ExpressionList (children 1)
        Literal UInt64_3